Barrel Length: 16"
Gas System: Carbine length
Barrel Profile: Carbine
Barrel Steel: 4150 Chrome-Moly Vanadium
Barrel Finish: Nitride
Chrome Lining: None
Muzzle Thread: 1/2-28
Chamber: 5.56 NATO
Twist Rate: 1:8
Barrel Extension: M4
Diameter at Gas Block: .750
Gas Block Type: Low-profile
Muzzle Device: A2 Flash Hider
Receiver Material: Forged 7075 T6
Receiver Type: M4
Handguard Type: IO 15" Lightweight M-Lok Rail
Bolt Carrier Group Nitrite carrier and parkerized bolt head MPI Included: Yes
Bolt Steel: Carpenter 158
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Fire Control Group: Mil-Spec
Overall Length: 24.5"
Weight: 4.0 lbs
Barrel Marking: "5.56 NATO 1/8"
Barrel: 16" 4150V Chrome Moly Vanadium steel barrel, chambered in 5.56 NATO, with a 1:8 twist, M4 barrel extension, and a carbine-length gas system. The barrel is finished with with a .750" diameter low-profile gas block, IO 15" Lightweight M-Lok Free Float Rail and an A2 flash hider.
Upper: Forged 7075-T6 A3 AR upper is hard coat anodized black for durability. Featuring M4 feedramp cuts, these upper upper receivers are made for us right here in the USA.
Bolt Carrier Group: For AR15 and M16 rifles and carbines. Bolt is made of shot-peened, Mil-spec Carpenter 158® steel. Gas key is secured with grade 8 fasteners and staked. Bolt carrier is nitrited and bolt head parkerized and MPI. Includes Charging Handle.
Lower Build Kit: IO enhanced EPT Lower Build Kit, Black
•NO RECEIVER OR MAGAZINE
ALL SALES ARE FINAL, WE DO NOT ACCEPT RETURNS OR EXCHANGES ON THESE PARTS KITS.